2018 Long Range Weather Forecast for Portage, WI

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How to Read Long-Range Weather Forecasts

Long-range predictions show weather trends in temperatures and precipitation. For example, will the winter be colder or warmer than average? Will there be more or less snow than what's typical for your area? Our famous predictions (traditionally 80% accurate) are made 18 months in advance, and meant to help you make more informed decisions for long-term planning.

Annual Weather Summary: November 2017 to October 2018

Winter will be warmer than normal, with the coldest periods in late November, early and late December, early January, and early February. Precipitation and snowfall will be below normal, with the snowiest periods in mid- to late December and early to mid-February. April and May will be cooler than normal, with near-normal precipitation. Summer will be hotter than normal, with near-normal precipitation. The hottest periods will be in late June, late July, and early to mid-August. September and October will be warmer and slightly drier than normal.